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Thermomechanical processing for recovery of desired < 001 > fiber texture in electric motor steels
Journal article

Thermomechanical processing for recovery of desired < 001 > fiber texture in electric motor steels

Dejan Stojakovic, Roger D. Doherty, Surya R. Kalidindi and Fernando J. G. Landgraf
Metallurgical and materials transactions. A, Physical metallurgy and materials science, v 39A(7), pp 1738-1746
01 Jul 2008
DOI: https://doi.org/10.1007/s11661-008-9525-2

Abstract

Materials Science Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology Technology
A processing route has been developed for recovering the desired lambda fiber in iron-silicon electrical steel needed for superior magnetic properties in electric motor application. The lambda fiber texture is available in directionally solidified iron-silicon steel with the < 001 > columnar grains but was lost after heavy rolling and recrystallization required for motor laminations. Two steps of light rolling each followed by recrystallization were found to largely restore the desired fiber texture. This strengthening of the < 001 > fiber texture had been predicted on the basis of the strain-induced boundary migration (SIBM) mechanism during recrystallization of lightly rolled steel from existing grains of near the ideal orientation, due to postulated low stored energies. Taylor and finite element models supported the idea of the low stored energy of the lambda fiber grains. The models also showed that the lambda fiber grains, though unstable during rolling, only rotated away from their initial orientations quite slowly.

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47 citations in Web of Science
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Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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